Radeon R9 280 vs Radeon R9 390X

In this comparison between Radeon R9 280 and Radeon R9 390X you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Radeon R9 280 will be the best choice, for others Radeon R9 390X will be their preference. Study the comparison tables below and make your choice.

Main Specs

  Radeon R9 280 Radeon R9 390X
Power consumption (TDP) 200 Watt 275 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors 1 x 6-pin + 1 x 8-pin 1 x 6-pin, 1 x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 3 GB
Display Connectors 2x DVI, 1x HDMI, 2x mini-DisplayPort 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon R9 390X has 37% more power consumption, than Radeon R9 280.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Both cards are used in Desktops.
  • Radeon R9 280 is build with GCN 1.0 architecture, and Radeon R9 390X - with GCN.
  • Radeon R9 280 and Radeon R9 390X are manufactured by 28 nm process technology.
  • Both graphics cards are the same length of 275 mm.
  • Memory clock speed of Radeon R9 280 is 200 MHz higher, than Radeon R9 390X.

Game benchmarks

high / 1080p 35−40 50−55
ultra / 1080p 21−24 30−35
QHD / 1440p 16−18 24−27
4K / 2160p 10−11 14−16
low / 720p 60−65 75−80
medium / 1080p 40−45 55−60
The average gaming FPS of Radeon R9 390X in Assassin's Creed Odyssey is 34% more, than Radeon R9 280.

Full Specs

  Radeon R9 280 Radeon R9 390X
Architecture GCN 1.0 GCN
Code name Tahiti Grenada XT
Type Desktop Desktop
Release date 4 March 2014 16 June 2015
Pipelines 1792 2816
Boost Clock 933 MHz 1050 MHz
Transistor count 4,313 million 6,200 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 104.5 184.8
Floating-point performance 3,344 gflops 5,914 gflops
Length 275 mm 275 mm
Memory bus width 384 Bit 512 Bit
Memory clock speed 1250 MHz 1050 MHz
Memory bandwidth 240 GB/s 384 GB/s
Shared memory -
Shader Model 5.1 6.3
OpenGL 4.6 4.6
OpenCL 1.2 2.0
Vulkan + +
FreeSync + +
Bus support PCIe 3.0 PCIe 3.0
HDMI + +
Bitcoin / BTC (SHA256) 408 Mh/s 684 Mh/s
Eyefinity + +
HD3D +
PowerTune +
TrueAudio + +
Mantle +
Design reference reference
Bridgeless CrossFire +
Number of Eyefinity displays 6
DisplayPort support +
CrossFire + +
VCE +
DDMA audio + +
Ethereum / ETH (DaggerHashimoto) 21.5 Mh/s 27.5 Mh/s
High bandwidth memory (HBM) -
LiquidVR +
TressFX +
UVD +
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